Strong electron-phonon interaction in multiband superconductors

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We discuss the effects of anisotropy on superconducting critical temperature and order parameter in a strongly coupled regime. The multiband representation is used as a model for anisotropy. We show that strong-coupling effects in multiband superconductors lead to pair breaking due to interband coupling because soft phonon modes play the same role as static impurities. This effect makes the order parameters in different bands equal to each other and limits the upper bound on critical temperature.
Original languageUndefined
Pages (from-to)214526-
JournalPhysical review B: Condensed matter and materials physics
Issue number21
Publication statusPublished - 2008


  • IR-59247
  • METIS-252476

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